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Some Galaxy S24 users say battery life worsened after installing One UI 9, including reports of substantial idle drain and a Galaxy S24 Ultra losing 95% over five hours and 20 minutes of heavy use. These are individual reports, and it is not yet clear whether the update is causing a widespread problem or when Samsung might respond with a fix.
Some Galaxy S24 owners say their phones are losing battery unusually quickly after installing Samsung’s One UI 9 update, with one Galaxy S24 Ultra report describing a 95% drop over five hours and 20 minutes of heavy use. The reports have appeared in online discussions, but the problem’s scope and cause are not confirmed.
The most striking account concerns a Galaxy S24 Ultra whose owner said the phone used 95% of its charge in five hours and 20 minutes. The usage was described as heavy, but the reported screen-on time was a little over three hours. That makes the figures difficult to interpret as a straightforward measure of battery performance: the account does not provide enough detail to establish what apps, settings, network conditions or background activity contributed to the drain.
Other Galaxy S24 owners have described weaker battery life in a Reddit discussion about the update. One user reported that the phone lost 40% of its charge in almost 11 hours while idle, alongside about two and a half hours of screen-on time. Those figures are user reports, not results from controlled testing. Other people have said their battery experience has not changed substantially since installing One UI 9.
There are also reports involving other Galaxy models, but they do not establish that the same problem affects the S24. A Galaxy S25 owner said they had begun charging their phone multiple times a day. Separately, a Galaxy S26 user in South Korea reported being unable to reach the lock and home screens after updating, encountering a “webpage unavailable” error during setup. Samsung’s suggested troubleshooting steps for that setup error were to update the browser and use a stable Wi-Fi connection.
Software update watch · Galaxy S24
Battery Drain In One UI 9? Some Galaxy S24 Users Are Having A Rough Time
Some owners report faster battery loss after updating. The accounts include heavy-use and idle-drain claims, but the scale and cause remain unconfirmed.
01 / What owners are reporting
Two patterns, one open question
Reports describe battery loss during heavy use and while idle. Differences in apps, settings, signal strength, background activity and time since updating make the figures hard to compare directly.
Nearly a full charge gone
An owner reported 95% battery use over five hours and 20 minutes, with a little over three hours of screen-on time. The account does not detail all contributing conditions.
Drain between sessions
Another user said the phone lost 40% in almost 11 hours while idle, alongside about two and a half hours of screen-on time.
Not every owner noticed a change
Some people say battery life has not changed substantially since One UI 9. Posts alone cannot show how common the issue is across S24 devices.
02 / Reported battery use
Numbers need context
The figures below summarize individual accounts. They do not measure typical battery performance or confirm a shared software fault.
03 / Wider update discussion
Related reports are separate cases
Other Galaxy models have appeared in online discussions, but their reports do not establish the same issue on the S24 or a shared cause.
More frequent charging
One owner said they had started charging their phone multiple times a day. This is an individual account.
“Webpage unavailable”
A user in South Korea reported seeing this error during final setup after updating, before reaching the lock and home screens.
Browser and Wi-Fi checks
For the S26 setup error, Samsung advised updating the browser and using a stable Wi-Fi connection. This is not a battery-drain remedy.
04 / Practical next steps
Monitor, document, watch for guidance
Owners who notice a sudden change can keep useful details together while the reports remain anecdotal and the timing of any Samsung response is unknown.
Track battery use
Note when the drain happens and how quickly the charge falls.
Record conditions
Include apps, settings, signal strength and background activity where possible.
Seek device support
Samsung support may offer troubleshooting suited to a specific device.
Look for confirmation
A Samsung statement, relevant release notes or systematic testing could clarify the scope.
What remains unknown
Scale, cause and timing are not confirmed
Available accounts do not establish whether the reports reflect a common software fault, individual device conditions or a mix of factors. No battery fix or release schedule has been confirmed.
How many devices?
There is no confirmed count of affected Galaxy S24 phones.
What is driving the drain?
No established link proves One UI 9 caused the reported changes.
Will there be a fix?
Samsung has not confirmed a battery fix or provided a release date in these reports.
Quick answers
Key questions
Is a One UI 9 battery bug confirmed on Galaxy S24?
No. Some owners report faster drain, but a widespread bug has not been confirmed.
How much battery did one S24 Ultra reportedly use?
One owner said 95% over five hours and 20 minutes of heavy use, with a little over three hours of screen-on time. It was not a controlled test.
Did anyone report drain while idle?
Yes. One user said their S24 lost 40% over almost 11 hours while idle; the circumstances and cause have not been independently established.
Has Samsung announced a battery fix?
No battery fix or schedule is confirmed. The reported Samsung guidance concerns an S26 setup error, not S24 battery complaints.
Battery Reports Could Affect S24 Owners
Battery life affects how reliably a phone can be used through the day, so even a problem limited to a subset of devices can prompt owners to delay an update or look for a way to address unexpected drain. The reports matter because they describe both heavy-use battery loss and possible idle drain, which may have different causes and remedies.
For now, however, individual posts cannot show how common the issue is. Differences in signal strength, app use, settings and the time since an update can all complicate comparisons. Readers should treat the reports as a reason to monitor their own devices, not proof that One UI 9 has caused a general battery defect across the Galaxy S24 line.
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One UI 9 Reaches Older Galaxy Phones
Samsung has been rolling out One UI 9 to current and earlier Galaxy phones. The reports described here focus on owners of the previous-generation Galaxy S24 series, though similar complaints have also been mentioned by some S25 users. The available accounts do not provide a controlled comparison between phones before and after updating.
The separate Galaxy S26 setup complaint adds another reported software issue to the discussion, but it concerns an error during the update’s final setup step rather than battery performance. Samsung advised the affected user to check the browser version and Wi-Fi connection. There is no confirmation that this setup bug and the battery complaints share a cause.
““heavy use””
— Galaxy S24 Ultra owner, in a report cited by Android Central via SammyFans
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Scale and Cause Remain Unknown
There is no confirmed count of affected Galaxy S24 devices, no published diagnostic data and no established link showing that One UI 9 itself caused the reported drain. The accounts vary, and some owners say they have not noticed a meaningful change. The information available does not establish whether the reports reflect a shared software fault, individual device conditions or a mix of factors.
It is also unclear whether Samsung is investigating the battery complaints or preparing a software fix. The response described for the Galaxy S26 setup error concerns browser updates and Wi-Fi; it is not confirmation of a battery-drain remedy. No release date for a related fix has been provided.
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Watch for Samsung Guidance
Galaxy S24 owners experiencing a sudden change can track battery use and note which apps, settings and conditions coincide with the drain. Samsung’s support channels may provide device-specific troubleshooting, but the reported cases do not point to a confirmed universal fix.
The next meaningful update would be a statement from Samsung addressing the battery reports, a software release with relevant fixes, or more systematic testing that clarifies how widespread the change is. Until then, the reports remain anecdotal, and the timing of any response is unknown.
Source: Android Central
Key Questions
Are Galaxy S24 phones confirmed to have a One UI 9 battery bug?
No. Some owners have reported faster battery drain after installing the update, but a widespread bug has not been confirmed.
How much battery did one Galaxy S24 Ultra reportedly lose?
One owner said the phone used 95% of its charge in five hours and 20 minutes of heavy use, with a little over three hours of screen-on time. This is an individual report, not a controlled test.
Have users reported battery drain while their phones are idle?
Yes. One Galaxy S24 user said their phone lost 40% over almost 11 hours while idle. The circumstances and cause have not been independently established.
Has Samsung announced a battery-drain fix?
The reported Samsung guidance in this account concerns a Galaxy S26 setup error, not the S24 battery complaints. No battery-drain fix or release schedule is confirmed.
Source: Android Central
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